Fix markdown editor escaped list markers

ui/src/lib/markdown.test.ts

@@ -0,0 +1,20 @@
+import { describe, expect, it } from "vitest";
+import { normalizeMarkdownArtifacts } from "./markdown";
+
+describe("normalizeMarkdownArtifacts", () => {
+  it("normalizes escaped unordered list markers and space entities", () => {
+    const input = "Here is a list:\n\n\\* foo \n\\- bar ";
+    const output = normalizeMarkdownArtifacts(input);
+    expect(output).toBe("Here is a list:\n\n* foo \n- bar ");
+  });
+
+  it("does not rewrite escaped markers inside fenced code blocks", () => {
+    const input = "```md\n\\* keep literal \n\\- keep literal \n```";
+    expect(normalizeMarkdownArtifacts(input)).toBe(input);
+  });
+
+  it("keeps escaped non-list syntax intact", () => {
+    const input = "\\*not-a-list";
+    expect(normalizeMarkdownArtifacts(input)).toBe(input);
+  });
+});